Printed pulley with one wheel. It consists of two parts that both have a hook, but put together they will form a full enclosed circle so the rope or whatever will not come out. To prevent the hook to open it is possible to us a ty-rap to ensure it will stay closed.

Alternatively if you mirror one of the hooks it will form an open hook. Still the same functionality.

• M5 bolt and nut, minimal 30mm
• 2 608 ZZ bearings (8x22x7)
• optional ty-rap to prevent hooks from opening

printed with 5 walls. No idea how strong they are, but I can lift an electric bicycle including battery without any problem.